If you have read my first book, Penelope Parker: Witch in Training, you will have noticed a big focus on food. The reason for this is that magic takes energy, and to replace that enrgy, one needs another source of energy, which is food. In order to do their magic, the girls have been taught to imagine their feet rooting down into the earth, much like the roots of a tree. The energy is drawn up through the legs into the body, and that energy is put into whatever spell they are doing. Although they don’t use their own body’s energy, the act of doing a spell costs energy, which of course, must be replaced. Therefore, after a large magical spell, or before doing one, the body must be fueled, and the way that is done is through eating.
Of course, Hecate will eat at any time, which is why she is so plump!